61. The apparatus used to measure the intensity of light is known as
62. What is the SI unit for measuring the luminous intensity?
63. Unit of power is known as-
64. Among the following quantities, which one has dimension different from the remaining three?
65. Radar is used for
66. The least count of the screw gauge is
67. Which one of the following is a vector quantity?
68. Lux is the SI unit of
69. SONAR is mostly used by
70. Kilowatt-hour is the unit of
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